RFR: JDK-8186946: Fix accessibility and other issues in the java.xml.bind module

[Jonathan Gibbons]

Please review these changes to address accessibility and other minor 
issues in
the API docs for the java.xml.bind module.

JBS: https://bugs.openjdk.java.net/browse/JDK-8186946
Webrev: http://cr.openjdk.java.net/~jjg/8186946/webrev
API: http://cr.openjdk.java.net/~jjg/8186946/api/java.xml.bind-summary.html

-- Jon

Notes on the changes follow:

src/java.xml.bind/share/classes/javax/xml/bind/JAXBPermission.java
     Convert file to use the standard "striped" pattern for tables

src/java.xml.bind/share/classes/javax/xml/bind/Marshaller.java
     Fix broken links that arise when relative links are inherited into 
the docs for subtypes

src/java.xml.bind/share/classes/javax/xml/bind/Unmarshaller.java
     Convert file to use the standard "striped" pattern for tables
     Fix broken links that arise when relative links are inherited into 
the docs for subtypes

src/java.xml.bind/share/classes/javax/xml/bind/annotation/XmlNsForm.java
     Convert file to use the standard "striped" pattern for tables

src/java.xml.bind/share/classes/javax/xml/bind/annotation/XmlType.java
     Convert file to use the standard "striped" pattern for tables

src/java.xml.bind/share/classes/javax/xml/bind/annotation/adapters/package-info.java
     Remove redundant <p> tags

src/java.xml.bind/share/classes/javax/xml/bind/annotation/package.html
     Convert file to use the standard "striped" pattern for tables
     Replace nested layout tables with simple lists

src/java.xml.bind/share/classes/javax/xml/bind/attachment/AttachmentUnmarshaller.java
     Convert file to use the standard "striped" pattern for tables

src/java.xml.bind/share/classes/javax/xml/bind/helpers/package-info.java
     Remove redundant <p> tags

src/java.xml.bind/share/classes/javax/xml/bind/util/package-info.java
     Remove redundant <p> tags

The following files are removed, since they are shadowed by the 
corresponding package-info.java
files:

    src/java.xml.bind/share/classes/javax/xml/bind/annotation/adapters/package.html
    src/java.xml.bind/share/classes/javax/xml/bind/helpers/package.html
    src/java.xml.bind/share/classes/javax/xml/bind/util/package.html


-- Jon